package com.zvin.test;

public class Hello{
  public double foo(double a, double b){
    return (a+b) * (a-b);
  }

  public static void main(){
    Hello hello = new Hello();
    System.out.println("answer---> 5+3=" + hello.foo(5, 3));
  }

  public int[][] returnArray(){
    int[][] arr = new int[2][2];
    arr[0][0] = 1;
    arr[0][1] = 2;
    arr[1][0] = 3;
    arr[1][1] = 4;

    return arr;
  }
}
